Grotto Geyser

Grotto Geyser's Cone

Grotto Geyser erupts about every eight hours. It splashes to a height of
10 feet (3m) for 1 1/2 to more than 10 hours. The weirdly shaped cone, that gives this
geyser its name, may have resulted from geyserite covering the trunks of trees that once
grew there.